Platform for testing excavation resistance of small-sized backhoe excavator

A platform for testing excavation resistance of a small-sized backhoe excavator, comprising a bucket, a mechanical arm device, a measuring device, a workbench frame, and a control device, wherein

• the bucket is hinged to the mechanical arm device, the mechanical arm device is fixed on the workbench frame;
• the control device is electrically connected to the measuring device, data acquired by the measuring device is used to construct a force balance equation, and through force analysis, excavation resistance is obtained;
• wherein the mechanical arm device comprises a forearm, an electric push rod for the bucket, an upper arm, an electric push rod for the forearm, an electric push rod for the upper arm, a bucket connecting rod, and a forearm connecting rod, wherein
• the upper arm is hinged to the forearm;
• a fixed end of the electric push rod for the bucket is fixed on the forearm, with a free end hinged to the bucket through the bucket connecting rod to drive bucket movement;
• a first end of the forearm connecting rod is hinged to the forearm, with a second end connected to a hinge point between the bucket connecting rod and the electric push rod for the bucket;
• a fixed end of the electric push rod for the forearm is fixed on the upper arm, with a free end connected to the forearm to drive forearm movement;
• and
• a fixed end of the electric push rod for the upper arm is fixed on the workbench frame, with a free end connected to the upper arm to drive upper arm movement;
• the measuring device comprises a bucket push rod displacement sensor, a forearm push rod displacement sensor, an upper arm push rod displacement sensor, and four pin shaft sensors, wherein the bucket push rod displacement sensor is installed on the electric push rod for the bucket to obtain displacement of the electric push rod for the bucket;
• the forearm push rod displacement sensor is installed on the electric push rod for the forearm to obtain displacement of the electric push rod for the forearm;
• the upper arm push rod displacement sensor is installed on the electric push rod for the upper arm to obtain displacement of the electric push rod for the upper arm;
• and
• the pin shaft sensors are installed on both sides of a hinge point between the bucket and the forearm and on both sides of a hinge point between the bucket connecting rod and the bucket.